Gas-purifying material.



sulfate of iron.

JOSEPH C. HECKMAN, 0F AITALONTOROUGH, PENNSYLVANIA.

GAS-PURIFYING- MATERIAL.

N 0 Drawing.

To all whom it may concern:

Be it known that I, JOSEPH C. I-InoKMnN, a citizen of the United States, and residlng in the borough of Avalon, in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements in Gas-Purifying Material, of which the following is a specification.

My invention consists in a new and 1mproved material for the purification of gas and other purposes.

The gas, as it comes from the producers, is contaminated with hydrogen sulfid which must be removed before the gas it fit for use.

The process of purifying the gas, now most commonly employed, consists in passing the same through a bed of suitable material which usually consists of iron borings or hydrated sesqui-oxid of iron mixed with shavings, sawdust or corncobs as a flufling material, sufficient moisture being added to the mixture to cause adhesion between the fluifing substance and the cleansing substance. This results in a fluffv, spongy mass through which the gas is passed. The mass so formed is highly combustible and subject to spontaneous ignition and fires. Also the valuable by-p'roducts, such as sulfur, are difficult to recover from the spent mass, owlng to the many contaminations due to the fluffing substance. Again the cost of the flufling substance and the expense of properly mixing the same with the purifyingsubstance 1s considerable and the mixed mass quickly becomes saturated and loses its porous quality and filtering efiiciency.

, My improved material consists in granulated blast furnace slag whose units or particles are permeated and covered with by drated sesqui-oxid of iron deposited from coal mine water filtered through a bed of said slag. By granulated slag I mean slag formed by running the molten slag from a blast furnace into water whereby is formed a vesicular, brittle, friable and pumice-like mass in the form of units which preferably range in size roughly from about an inch in diameter down to pea size. This slag contains oxid of lime, silicia, alumina, and a small percentage of iron or manganese.

The coal mine water is impregnated with granulated slag with the followingresult.

The oxid of lime of the slag neutralizes the Specification of Letters Patent.

The coal mine water is .passed or filtered through a bed of the Patented Sept. 28, 1915.

Application filed March 9, 1915. Serial No. 13,146.

drated sesqui-oxid of iron which saturates the pores of the slag particles and coats the exterior of the same. I thus obtain without mechanical mixing a combination of a fluffing substance, the slag, and a purifying substance, the hydrated'sesqui-oxid of iron, in

rifying capacity than that used in the present practlce, and therefore a much larger volume of gas may be filtered through the same quantity of material than has heretofore been possible, thereby cheapening the cost of gas manufacture. Again'the purifying mixture does not become soggy or lose its flufied, porous structure. The mixture or combination is non-combustible and danger or fire 1s avoided. The sulfur deposited from the gas forms with the slag sulfur pyrites of great commercial value from which the sulfur may be readily and cheaply recovered in a pure state. The purifying mixture is also more lasting than those now in use.

y substance with the base or fluifing substance forms a better combination than can be produced by mechanical mixing as the purifymethod of combining the purifying ing substance permeates and saturates the peculiar porous structure of the slag so that the gas passing through the mass is brought into intimate contact with the purifying material.

My above described substance is valuable for many other purposes in addition to gas purification. Thus it may be used for an' agricultural fertilizer or as a paint pigment. An analysis of the product has proven that it contains ingredients which make it a high class fertilizer. 4 What I desire to claim is 1. A new product of manufacture consisting of granulated blast furnace slag permeated with hydrated sesqui-oxid of iron. '2. A new product of manufacture produced by passing coal mine water through a .bed of granulated blast furnace slag.

3. A new product of manufacture pro- Signed at Pittsburgh, Penna., this 8 th day duced by passing coal mine Water through a of March, 1915.

bed of blast furnace slag, whereby the sulfid of iron in the Water combines With the oxid of lime in the slag to form hydrated sesqui-oxid of iron deposited in the pores of the slag.

JOSEPH C. HECKMAN Witnesses:

SYLvEsTER J. SN-EE. E. A. LAWRENCE. 

